I assume that by square corners you mean 90 degree angles. if this is the case then there are 2 in a pentagon. Hope I helped :)
Solution:
1) Distribute
12a+12b
Done!
Im not exactly sure what you are asking but 18 + 48 is equivalent and simplified!
Answer:
I think the answer is 7.64331210191
Explanation:
I divided 24 by 3.14 and got 7.6433121091
The table in Part A represents y as a function of x. This means that the value of Y is dependent on the value of X. The table can be represented by an equation that describes the relation of X and Y:

or

By substituting any value of X, you get a specific value of Y based from the given relationship, thus Y is a function of X.
For Part B, the value of f(150) is $470 and it represents the total cost for borrowing a rowboat for 150 hours. By substituting the value of x = 150 into the function, you get the total cost: